Oil prices flat after weeks of steep declines

NEW YORK (Reuters) - Oil prices were flat on Monday after diving 13 percent since late May as rising production in the United States, Libya and Nigeria have foiled an OPEC-led effort to support the market by cutting production.

NEW YORK (Reuters) - Oil prices were flat on Monday after diving 13 percent since late May as rising production in the United States, Libya and Nigeria have foiled an OPEC-led effort to support the market by cutting production.